Regular Expressions 101

Positive Lookbehind(?<=) — does not consume characters

\d+a digit, repeated at least once

_the literal _ (95₁₀ / 137₈ / 5F₁₆)

\d+a digit, repeated at least once

Positive Lookahead(?=) — does not consume characters

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

Detailed match information will be displayed here automatically.

26 tokens

Regular Expression

(?<=)\d+_\d+(?=)

New

123_4,56776_17,_,99997_1,_,87969_3,_,_,_,_,_,_,_,456_9

123_4,56776_17,_,99997_1,_,87969_3,_,_,_,_,_,_,_,456_9